Mastering Keypad Functions on the CASE 921G Wheel Loader

[MikePhua]

The CASE 921G and Its Intelligent Control System
The CASE 921G wheel loader is part of the G Series lineup introduced by CASE Construction Equipment, a brand with roots dating back to 1842. Known for its robust build and operator-focused design, the 921G combines mechanical strength with advanced electronic control. With an operating weight of approximately 24,000 kg and a 4.2 m³ bucket capacity, it’s engineered for high-production environments such as aggregate yards, municipal works, and bulk material handling.
One of the defining features of the G Series is its integrated keypad system, which replaces traditional levers and switches with programmable electronic controls. This shift reflects a broader industry trend toward digital interfaces that enhance precision, reduce operator fatigue, and enable customizable machine behavior.
Keypad Layout and Function Overview
The keypad on the 921G is located to the right of the operator seat, within easy reach. It includes soft-touch buttons with backlit icons, each corresponding to a specific function. Among the most critical are:

• Return-to-Dig
  
• Height Control
  
• Float Mode
  
• Auto-Ride Control
  
• Bucket Position Memory
  
• Transmission Cutoff
  

Terminology annotation:

• Return-to-Dig: Automatically lowers the boom and levels the bucket to a preset position after dumping, reducing cycle time.
  
• Height Control: Stops the boom at a programmed lift height, useful for loading trucks or hoppers.
  
• Float Mode: Allows the boom to follow ground contours without hydraulic resistance, ideal for back-dragging.
  
• Ride Control: Dampens boom movement during travel to reduce spillage and improve operator comfort.
  
• Transmission Cutoff: Temporarily disengages the transmission when braking, allowing full engine power to be directed to hydraulics.
  

Using Return-to-Dig and Height Control Effectively
Operators transitioning from older loaders may find the absence of mechanical self-leveling unfamiliar. On the 921G, these functions are handled electronically. To use Return-to-Dig:

• Lower the boom until the bucket is flat on the ground
  
• Press and hold the Return-to-Dig button until the system beeps
  
• The loader will now automatically return to this position after each dump
  

Height Control is similarly programmed:

• Raise the boom to the desired dump height
  
• Press and hold the Height Control button until confirmation
  
• The boom will stop at this height during lift cycles
  

These programmable positions can be adjusted on the fly, allowing operators to tailor the machine to different tasks without leaving the cab.
Field Anecdotes and Operator Adaptation
In Saskatchewan, a quarry operator shared how switching to the 921G improved truck loading efficiency. By setting the dump height to match the sidewall of their haul trucks, they eliminated over-lifting and reduced cycle time by 12%. The Return-to-Dig function allowed the operator to focus on positioning rather than boom control, improving safety in tight quarters.
Another story from a snow removal crew in Maine highlighted the value of Float Mode. During early morning operations, the operator used float to back-drag snow from loading docks without damaging the pavement. The keypad made it easy to toggle between float and lift modes without fumbling for mechanical detents.
Maintenance and Troubleshooting Tips
Electronic controls require different maintenance strategies than mechanical linkages. To keep the keypad system functioning reliably:

• Clean the keypad surface weekly with non-corrosive cleaner
  
• Inspect wiring harnesses for abrasion or moisture intrusion
  
• Update firmware during scheduled service intervals
  
• Calibrate boom sensors annually or after hydraulic work
  
• Use diagnostic mode to check button response and actuator feedback
  

If a function fails to engage, check for stored fault codes in the onboard display. Many issues stem from sensor misalignment or low hydraulic pressure, not keypad failure.
Customization and Operator Profiles
The 921G allows multiple operator profiles to be stored, each with unique keypad settings. This is especially useful in fleet environments where different operators prefer different boom speeds, ride control settings, or bucket positions.
To set up a profile:

• Navigate to the settings menu on the main display
  
• Assign a name or ID to the profile
  
• Save current keypad configurations
  
• Profiles can be recalled at startup or manually switched
  

This feature reduces training time and ensures consistency across shifts.
Conclusion
The CASE 921G’s keypad system transforms the way operators interact with the machine. By replacing mechanical functions with programmable logic, it offers greater precision, adaptability, and efficiency. While the transition may require a learning curve, the benefits in cycle time, fuel economy, and operator comfort are substantial. With proper use and maintenance, the keypad becomes not just a control panel—but a productivity tool that reshapes the workflow of modern loading operations.